Spool Ties are specialized components that secure electrical conductors to spool-type insulators in power distribution systems, replacing hand ties over armor rods while maintaining electrical isolation. The preformed helical design wraps around both conductor and insulator to create a stable connection in horizontal or vertical mounting orientations, accommodating line angles up to 10 degrees horizontally and 40 degrees vertically.
These ties provide enhanced abrasion protection against conductor motion from aeolian vibration and galloping. The preformed shape enables easier, more uniform installation than traditional methods while delivering improved Radio Interference Voltage (RIV) characteristics. Constructed with corrosion-resistant aluminum-covered steel wire, they offer extended service life and comply with National Electric Safety Code (NESC) requirements for unbalanced load performance.
Spool Ties are available in two configurations: versions with elastomeric pads for bare conductors (providing cushioning to minimize abrasion) and versions without pads for jacketed conductors. The SPT series fully loops around the insulator, while the QST series features an Omega shape for quick attachment to pre-installed insulators. Both accommodate conductor types including Aluminum Conductor Steel Reinforced (ACSR), All Aluminum Conductor (AAC), All Aluminum Alloy Conductor (AAAC), Aluminum Conductor Alloy Reinforced (ACAR), and compacted ACSR, with diameters from 0.245 to 0.968 inches.
Compatible with American National Standards Institute (ANSI) Class 53-1, 53-2, and 53-3 spool insulators having 1-3/4 inch neck diameters, these ties feature applied lengths from 19 to 32 inches with color-coded identifiers for different conductor size ranges.
RaxPower Spool Tie Supplier: Superior Durability with Elastomeric Protection
RaxPower’s formed wire spool ties are designed for use with the following conductor types:
- ACAR
- ACSR
- AAC
- AAAC
- Compacted ACSR
- AWAC®
These spool ties are used in applications where the spool insulator is mounted either horizontally or vertically, and the conductor is aligned to sit in the groove of the insulator.
Each Spool Tie is supplied with an elastomeric tie tube engineered to minimize abrasion to bare conductors and insulators, directly enhancing durability and protection—a reflection of RaxPower’s commitment to quality and reliability.
As China’s leading manufacturer of pole line hardware, established in 2003 in Hebei Province with over 21 years of experience, RaxPower leverages 17,000 square meters of production facilities and advanced processes like hot forging for greater strength and precise sizing. Strict quality control, including raw material selection and multi-stage testing, ensures every tie meets high standards.
Compatible with 1-3/4” neck diameter interchangeable headstyle insulators and recommended for the following ANSI class spool insulators:
- ANSI Class 53-1
- ANSI Class 53-2
- ANSI Class 53-3
These products embody the company’s focus on abrasion minimization and long-term performance.
| Parameter | Value |
|---|---|
| General | |
| Material | Aluminum-covered steel wire |
| Insulator Compatibility | ANSI Class 53-1, 53-2, 53-3 with 1-3/4″ neck diameter |
| Conductor Types | ACSR, AAC, AAAC, ACAR, Compacted ACSR |
| Product Series | SPT (fully loops around insulator), QST (Omega shape for quick attachment) |
| Types | With elastomeric pads for bare conductors; without pads for jacketed conductors |
| Dimensions | |
| Conductor Diameter Range | 0.245 to 0.968 inches |
| Applied Length Range | 19 to 32 inches |
| Performance | |
| Line Angles | Up to 10° horizontal, 40° vertical |
| Unbalanced Load Performance | Exceeds National Electric Safety Code requirements |
| Abrasion Protection | Enhanced protection against aeolian vibration and galloping |
| Radio Interference Voltage | Improved characteristics compared to hand ties |
| Conductor Size Specifications | |
| Color Code by Size | • 0.245-0.277 in: Orange, Applied Length: 19 in • 0.316-0.357 in: Red, Applied Length: 24 in • 0.358-0.405 in: Yellow, Applied Length: 26 in • 0.406-0.459 in: Blue, Applied Length: 28 in • 0.460-0.520 in: Orange, Applied Length: 31 in • 0.521-0.588 in: Red, Applied Length: 32 in • 0.589-0.665 in: Purple, Applied Length: 23 in • 0.666-0.755 in: Brown, Applied Length: 25 in • 0.756-0.858 in: Red, Applied Length: 26 in • 0.859-0.968 in: Blue, Applied Length: 28 in |
Frequently Asked Questions（FAQS）
A Spool Tie is a specialized component designed to secure electrical conductors to spool insulators in power distribution systems. It provides mechanical support while maintaining proper electrical isolation, and replaces hand ties over armor rods for superior protection against conductor motion and abrasion.
Key benefits include superior mechanical strength exceeding NESC requirements, enhanced abrasion resistance with elastomeric pads, a preformed helical shape for easier and more uniform installation, improved Radio Interference Voltage (RIV) characteristics, and corrosion-resistant aluminum-clad steel construction for extended service life.
Spool Ties are wrapped around both the conductor and the spool insulator, and can be mounted horizontally or vertically. The preformed helical shape ensures a tight, uniform fit that reduces installation time and minimizes the risk of errors, making it ideal for projects requiring rapid and reliable deployment.
Spool Ties can accommodate line angles up to 10 degrees in horizontal mounting and up to 40 degrees in vertical mounting, depending on factors like conductor size, tension, and span lengths.
Spool Ties are compatible with various conductor types, including ACSR, AAC, AAAC, ACAR, Compacted ACSR, and plastic jacketed conductors. They accommodate conductor diameters ranging from 0.245 to 0.968 .
Spool Ties are designed for use with standard spool insulators, specifically ANSI Class 53-1, 53-2, and 53-3 types with a 1-3/4 neck diameter. Some variants may also fit other ANSI classes.
Spool Ties are manufactured from aluminum-clad steel wire. For bare conductors, they include an elastomeric pad or tie tube for abrasion protection, while versions without pads are used for jacketed conductors.
RaxPower implements multi-stage testing, including load tests and gauge inspections per IEC 120 standards, with test reports available upon request. Our spool ties exceed NESC unbalanced load requirements and feature consistent preformed helical shapes for reliable performance, backed by hot-dip galvanization for corrosion resistance.
Yes, RaxPower offers spool ties in bulk packaging with standardized carton and pallet quantities (e.g., up to 2800 units per pallet) to support large-scale projects. Each product undergoes strict quality control, including load testing and gauge checks, ensuring uniform performance and reliability across all orders. 
What is a Spool Tie and what is its primary function?
What are the key benefits of using Spool Ties?
How are Spool Ties installed?
What line angles can Spool Ties handle?
Which types of conductors are compatible with Spool Ties?
What insulator types are Spool Ties designed for?
What materials are Spool Ties made from?
What quality assurance measures are in place for your spool ties?
Can you accommodate large project orders with consistent product quality?
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